ارزیابی اثر تنش نمک‏های کلرید سدیم و کلرید کلسیم بر مؤلفه‏های جوانه‏زنی و رشد گیاهچه رقم بهاره کلزا

In order to the investigation of CaCl2 and NaCl salinity stress on germination characteristics of spring canola an experiment was done. This study was conducted as compeltly randomized design with four replications. Salinity factor included 4 levels of 0, 50, 150 and 150 mmol CaCl2 and NaCl. Results showed that salinity has significant effect on root length, shoot length and vigor index. Maximum of root length was observed in CaCl2 (100), that there was not significant difference with NaCl(100). The least shoot length was obtained in NaCl(150). Also this treatment has the least vigor index value that there was not significant difference with NaCl(150) and NaCl(50). Germination was significantly decreased as salinity level was increased. Increasing in salinity has the negative effect on germination rate and maximum of germination of canola seed. Investigation of regression coefficient of germination rate, seedling length, and seedling dry matter versus of salinity showed that with increasing of salinity level, these traits were decreased. Mean germination time of germination and maximum of germination were decreased as salinity was increased.